Press for webs



F. X. AMBROSE Jan. 7, 1958 PRESS FOR WEBS 4 Sheets-Sheet 1 Filed Aug. 8,1955 INVENTOR H'ancz's/lmbrwe ATTORNEYS Jan. 7, 1958 F. x. AMBROSE2,818,904

PRESS FOR WEBS Filed Aug. 8, 1955 4 Sheets-Sheet 2 fi'azzc'zls X.Ambrose 1B? EMW/ovzw ATTORNEYS INVENTOR F. X. AMBROSE PRESS FOR WEBSJan. 7, 1958 4 Sheets-Sheet 3 Filed Aug. 8, 1955 INVENTOR fraizazs X.llmbrose ATTORNEYS Jan. 7, 1958 F. X. AMBROSE PRESS FOR WEBS 4Sheets-Sheet 4 Filed Aug. 8, 1955 INWFNTOR Hands XAmbrose ATTORNEYSUnited States Patent PRESS FOR WEBS Francis X. Ambrose, San Diego,Calif., assignor to Alsynite Company of America, San Diego, Calif., acorporation of California Application August 8, 1955, Serial No. 527,024

14 Claims. (Cl. 1541) This invention is directed to improvements in rolltype web presses.

In carrying out the manufacture of fiber glass sheeting, relativelylarge rectilinear mats of fiber glass are passed through an impregnatingbath of suitable resin and assem bled between two in-running webs ofcellophane stock and then passed between a pair of press or impregnatingrollers having pressure applied thereto such that the whole laminatedstructure is pressed together or squeezed under controlled conditions.In applying the pressure to the fiber glass mat sandwiched between thecellophane .web, the resin carried by the fiber mat is pressed out andsqueezed into intimate contact with the fibers making up the mat. It isimportant to control the feed-in of the in-running cellophane webs andto control the pressure acting on the squeeze rolls between which thelaminated assembly of webs and mat passes.

It is an object of my invention to provide a press of two iii-runningcooperating rolls with resilient and pressure controlled mounting at theends of the rolls.

Another object of my invention is to provide in an impregnating rollerpress for assembling webs, a web supply having means for stretching andexpanding the web before it passes between the rollers.

A further object of my invention is to provide a guided support for theend of a lower roll in a press with means for vertically positioning theroll and a movable support means for an upper roll cooperating with thelower roll such that controlled pressure may be applied to the upperroll.

A further object of my invention is to provide vertical guide mountingsfor supporting the housing supporting the bearings of a pair of squeezerollers.

A still further object of my invention is to provide in a web assemblypress a mounting for the Web supply spool such that the web may be fedunder tensioning over a bearing bar and expander roller to a positionbetween a pair of press rolls.

Still further objects and the entire scope of applicability of thepresent invention will become apparent from the detailed descriptiongiven hereinafter; it should be understood, however, that the detaileddescription and specific example is given by way of illustration only,and, while indicating the preferred embodiment of the invention, is notgiven by way of limitation, since various changes and modificationswithin the spirit and scope of the invention will become apparent tothose skilled in the art from this detailed description.

For a more complete understanding of the nature and scope of myinvention, reference may be had to the specification, claims, anddrawings in which:

Fig. 1 is a side elevation of the press assembly;

Fig. 2 is an enlarged side elevation of the mounting for the ends of thepress rolls;

Fig. 3 is a vertical elevation along line 3-3 of Fig. 2 showing themounting for the ends of the-rolls;

Fig. 4 is a vertical sectional view along'line 4-4 of See Fig. 2 showingthe vertical guides for the end bearings of the rolls of the press;

Fig. 5 is an enlarged side elevation of the web roll support and tensioncontrol;

Fig. 6 is a fragmentary top plan view of the web roll support shown inFig. 5; and

Fig. 7 is an enlarged fragmentary side elevation along line 7-7 showingthe tensioning means for the spool of web stock.

Throughout the various figures and written description like referencenumerals refer to similar parts.

The press assembly is generally indicated at 10 and comprises twovertically disposed spaced-apart end frames 1111, one only of which isshown in Fig. 1. These end frames 11 are suitably interconnected bytransverse channel members 12-12 and angle bars 1313. A press of thistype handles webs of over 5 feet in Width and thus it is essential thatthe cooperating press rolls be adequately supported and yet be movabletoward each other for pressure adjustment. In use the press 10 receivesa glass fiber mat from impregnating zone 14 and assembles it between twoin-running webs fed in between press rolls 18 and 19 as will bedescribed.

The assembled mat and webs leave the press 10 and pass over a tablegenerally indicated at 15.

Reference to Fig. 3 shows the lower roll 16 formed with reduced diameterend trunnions 17. The diameter of roll 16 is 2 inches While the upperroll 18 is 2 /2 inches and extends out beyond the trunnions 17 of thelower roll. Trunnion 17 is supported by a bearing piece 19 housed in abearing support 20. Reference to Fig. 2 shows bearing support 20 asbeing of elongated shape and having a centrally extending upper portion20 which is apertured to receive the bearing bushing 19. Toward eitherend of the bearing support 20 there are formed therein verticalapertures 21, see Fig. 4, which receive at their upper and lower endsbushings 22-22. In alignment with the apertures 21 and thereabove andtherebelow are pillow blocks 23 which are secured to the outer face offrame 11 by means of bolts 24. The upper ones 23' of these pillow blockshave threaded apertures to receive the upper threaded end of guide bolts25 which pass through the apertures 21 in the ends of the housingsupport member 20. Received over the upper ends of the bolts 25 arecompression springs 26 Which are positioned intermediate the upperpillow blocks 23 and the upper bushing 22 at each end of the bearingsupport 20.

Compression springs 26 urge the bearing support 20 downward and thebearing support member 20 is supported on a threaded stud 27 which isthreadedly received in threaded aperture 28, see Fig. 3, which extendsvertically into the lower portion of bearing housing member 20. Stud 27has a reduced neck 27 and a lower end 27". Neck 27 is received in apillow block 28 secured to frame plate 11 by means of bolts 29. Thelower end of stud 27 has secured thereto as at 27" a hand wheel 30 as bymeans of setscrew 30' so that threaded stud 27 may be rotated and inturn bearing housing member 20 is moved vertically up and down on theguide bolts 25 and against the compression springs 26. Lock means areprovided for the hand wheel 30. The lock means for Wheel 30 comprises aplurality of spaced-apart apertures at 31 extending in a radial mannerin the periphery thereof so as to receive a slide bolt 32 supported forhorizontal sliding movement in bearing blocks 33-33 and movable by meansof the traverse hand grasp portion 32. This same type of bearing supportis provided at the other end of lower roll 16 and attached to thecorresponding vertical end frame member 11 at that end.

The mounting for the end of the upper roll 18 will now be described.Upper roll 18 is about 2 /2 inches in diameter and is larger than lowerroll 16. It extends at each end beyond the end of the journal 17 of thelower roll as at 18' where it receives a bearing bushing 32 which iscarried in an upper bearing support member generally indicated at 33.Upper bearing support member 33 comprises an outer rectangular-likeblock piece 34 having a lower portion which houses the bearing 32 whilethe upper portion thereof has vertically spacedapart apertures at eitherside as at 34, see Fig. 3, which receive capscrews 35 that secure theouter bearing support member 34 to the inner member 36. inner bearingsupport member 36 has vertically spaced-apart apertures 37 therein, seeFig. 4, which receive bushings 38 at the ends thereof that serve asbearings for vertical guide bolts 39. The lower ends of the verticalguide bolts 39 are threaded and are received within threaded aperturesin pillow block members 40 secured to the outer face of frame 11 bymeans of bolts 41. The upper pillow block members 40--40 are merelyapcrtured to receive the upper ends of the guide bolts 39. Positioned onthe lower ends of the guide bolts 39 and intermediate the lower pillowblocks 40 and the bearing support member 36 are compression springs 37which serve to yield ingly support the upper roll 13. Reference to Fig.3 shows a lower stop member 41 secured below the block portions 36 tothe frame member 11 as by means of rivets or screws 42. This stop member41 limits the downward movement of the bearing support 33 for the upperroll 18. The two pairs of guide bolts 25 and 39 guide the rolls 16 and18 respectively, in true up and down movement.

Movement of the upper roll 18 in a downward pressing direction againstroll 16 is controlled hydraulically as will be described. A pistonmember 4-3 is received in a vertical manner in a recess 44 provided inthe central upper portion of outer member 34 of the upper bearingsupport member 33. The upper end of piston 43 is received within acylinder 45 which is disposed in a vertical manner and held within ahorizontally disposed flange 46 by means of bracket 48 welded as at 47to frame 11.

Brackets 48 are apertured and receive bolts 50 which secure the flange46 thereto. The upper end of cylinder 45 is threaded and receives thehydraulic fitting 51 having a hydraulic pressure line 52 attachedthereto. The up per end of piston 43 has a pair of spaced apart grooveswhich house O-rings 53 so as to provide pressure seals between pistonand cylinder. Thus, upon application of pressure in the hydraulic line52 pressure is applied to the interior of cylinder 45, piston 43 rigidlyattached to upper bearing support member 33 is moved clownwardly so asto move roll 18 toward lower roll 16 and apply pressure therebetween therolls and to the work passing therebetween. It will be observed in Fig.1 that frame it. has a cutout portion 11 therein to receive the handwheel 36 and that at its lower portion has a V-like cutout portion at 11extending into its left-hand face so that the lower supply roll or spoolS may be inserted and removed.

The mounting for the cellophane or the like enrobing web material forthe mats is housed on spools S and S. The lower and upper spools, S andS, respectively, will now be described. The mounting for each of thesespools is the same and thus the upper mounting for the upper spool Swill only be described. Attached to each end of the outer face of framemember 11 in a pivoted manner are angle iron members 55 as by means ofpivot bolt 56 adjacent one end of members 55. This mounting structurefor supporting spool S is shown in Figs. 5, 6, and 7. A second angleiron member 57 is positioned in spaced relation below angle iron member55 and it has an upper web portion 57 of substantial width as shown inFig. 6, compared to the vertical flange 57" of the angle iron member 57.Angle iron member 57 is rigidly attached as by welding to the frame 11.A threaded stud 58 having a hand wheel 58 at the lower end thereof isthreadedly received by a threaded aperture in an angle iron bracket 59welded to frame 11, see Fig. 1, so that the stud 58 rests against thelower surface of horizontal flange 55' of angle iron member 55. Thus, byscrewing the stud 58 up or down the angle member 55 is pivoted up ordown about its pivot pin 56 and thereby raised and lowered. Slidablymounted on the upper surface of angle iron 55 is a third angle ironmember 60 having its flange 60 resting against the flange 55' of angleiron member 55 for sliding movement. The third angle iron member 60 isrestrained for lengthwise movement on the top of flange 55 of angle ironmember 55 by blocks 61 and 62 attached to the angle iron member 55 as bywelding. Secured to one end of the third angle iron member 60 is atransversely extending flange 62 which is aperturcd to receive athreaded stud 63 that is secured thereto by nuts 64. Threaded stud 63 isthreadedly received within a small angle-iron member 65 attached to thepivot end of angle iron 55. Stud 63 has a hand wheel 63 at the outer endthereof and the angle iron member 60 may be slidingly moved along angleiron 55 and locked in place. A pair of spaced-apart rollers 66 and 67are secured to the angle iron member 60 by means of pins 68, see Fig. 5.These rollers 66 and 67 support a oneinch diameter shaft 69 thatsupports the upper spool S of cellophane or enrobing stock. Shaft 69 hasa pair of flanges 70-71 secured thereto at either end in spaced relationat the ends of roll 66 and 67 so as to hold the shaft 69 from movinglengthwise. A suitable spool support fitting 72 is secured to shaft 69.By means of the threaded studs 58 and 63, the supports for the ends ofshaft 69 and the spool S of web stock may be adjustably positioned.Tension is applied to the spool S and the shaft 69 as will now bedescribed.

Reference to Fig. 3 shows a pulley 73 rigidly attached to the shaft 69as by means of a key 74. Passing over this pulley 73 is a flexible belt75 which has one end 75' secured by bolt 76 to angle iron member 57.Bolt 76 also passes through an apertured end of a plate 77 having a pairof upstanding spaced-apart lugs 78-78 secured thereto which support theends of a circular shaft 79 over which the movable end of flexible belt75 is led. Movable end 75" of belt 75 is attached to a slotted end 78 ofa slide block 79 by means of capscrews 80. Rigidly attached to block 79is a threaded stud 81 which extends outwardly beyond the right-hand endof flange top plate 57 and passes through a pair of apertured lugs 82welded in spaced relation apart on the top surface of angle iron 57. Athreaded nut 83 is received over the end of the threaded stud 81 and byadjusting the same, tension is placed on the flexible belt 75 sinceblock 79 slides on the top flange 57'.

It will be observed in Figs. 5 and 6 that the shaft 69 supporting thespool S may be adjusted upwardly by pivoting angle iron 55 andtransversely of frame 11 by sliding member 60. Tension may be applied tothe flexible belt 75 passing over pulley 73 rigidly attached to shaft 69so as to apply drag on the spool S and thus tension may be applied tothe web led therefrom.

Reference to Fig. 1 shows the web w led from spool S over a fixedbearing bar 34 which extends between the end frame members 11-11 in aposition, see Fig. l, to the left of a vertical plane passing throughthe spool S and thus on the opposite side to such a vertical plane as ispositioned the pair of press rolls 18 and .19. Bar 84 is covered withdielectric material such as Teflon which is molded thereon so as toprevent static electricity being induced in the web w. Positionedintermediate the rolls 18 and 19 and the supply spool S is an expandingroller 85 which is about 4 /2 inches in diameter and over which the webw is led in its reach to the upper surface of the upper roll 19 overwhich it is led so as to enter the press rolls from the right-hand sideas viewed in Fig. 1. Expander roller 851's mounted on a bearing bracket86 by means of a pivot screw 87. Bearing bracket86 is attached to theend frame 11 as by means of an angle iron 88. The web from the lowerspool S is likewise led over a similar fixed bearing bar 84' and anexpander roller 85. This lower web is fed over the lower portion oflower roll 18 into the nip from the right so that the assembledimpregnated mat of fiber glass (not shown) is sandwiched between the twoin-running webs of cellophane andsqueezed by means of the pressure rolls18 and 19 so as to disperse the resinous material throughout the fibermat.

In operation the assembled lamination of impregnated mat between the twoweb sheets is pulled to the left as viewed in Fig; 1 over the spanningplate or table 15. The spools Sand S carrying the web supplies aremounted so that the web may be fed with no wrinkles therein as it isintroduced between the press rolls 18 and 19. The bearing bars 8484 andthe expander rolls 85- 85 over which the webs are led stretch: andsmooth out the web so that it is under a uniform condition as it is fedbetween rolls 18 and 19 to enrobe the glass fiber mat sandwichedtherebetween. The rolls 18 and 19 are adjustably supported in amannerthat permits proper leveling and uniform pressure application betweenthe roll which is essential in providing a uniform sheet of fiber glassof uniform thickness and density.

What is claimed as the'invention is:

1. A press for continuously pressing together material sandwichedbetween two in-running webs comprising a pair of upright end frames, ahorizontally disposed lower roll; means for mounting the lower rollcomprising, an end bearing assembly at each end of the roll, a pair ofvertically extending spaced apart guide members attached to each frameand in guiding engagement with each of said bearing assemblies, biasingmeans on said spaced apart guides urging, said bearing assembly downwardand adjustable support means attached to the frame and in supportingengagement with said bearing assembly for moving the bearing assemblyand the lower roll up and down while said biasing means urges thebearing assembly downward; an upper horizontally disposed roll forpressing engagement with said lower roll to press together the webs andthe material sandwiched therebetween; means for mounting the upper rollcomprising, an end bearing assembly at each end of the upper roll, apair of vertically extending spaced apart guide members attached to eachof said frames and in guiding engagement with each of said bearingassemblies for the uppe rroll,. biasing means associated with saidvertically extending spaced apart guide members and urging said bearingassemblies for the upper roll upward; means for supporting the ends ofanupper and a.lower spool of web stock, each of said spool support meansbeing attached tosaid. frame members and comprising a base memberpivotally attached to said frame members, a secondary member sli-dablymounted on said base member, a pair of rollers mounted on said slidemember and adapted to rollingly support the end of each spool; means forapplying a resistance to the rolling movement of each spool; guide meansover which said web from the spool is led to between said rolls; andfluid pressure means associated with each ofsaid upper bearingassemblies for applying pressure thereto'to urge said upper roll towardssaid lower roll to apply pressure to the webs and material passingbetween said rolls.

2. A press according to claim 1 wherein said means for applyingaresistance to the rolling movement of each spool comprises a flexibleband attached to said frame and passing over an end of said spool forfrictional engagernent therewith and means for applying a tension to theother end of said flexible band.

3. A press according to claim 2 wherein said end bearing assemblies forsupporting the ends of said rolls comprise a bearing sleeve directlysupporting the end of the roll and a support member for the bearingsleeve,

said: support member having guiding engagement with said. spaced apartguides.

4. A press according to claim 2 wherein said vertically extending guidemembers for each bearing support member are bolts and include aperturedblock members attached to said frame for supporting said bolts, saidblock members for each guide bolt for the lower bearing support memberbeing spaced apart vertically with the upper block member being threadedto receive said bolt while the block members for each guide member arevertically spaced apart with the lower such member being threaded toreceive the upper guide bolt supported thereby.

5 A- press according to claim 3 wherein the upper roll is longer thanthe lower roll and projects beyond each end of the lower roll, saidbearing support member for the upper roll comprising a first memberguidingly supported by its vertical guide members and said biasing meansand a second member attached to said first member outwardly thereof andhaving a depending portion supportingthe bearing sleeve attached to andsupporting each end of the upper roll.

6. A press according to claim 5 wherein said fluid pressure meansassociated with each bearing assembly for the ends of the upper roll isattached to said second member of the upper bearing support member.

7. A press according to claim 6 including stop means attached to saidframe to limit the downward movement of each. upper bearing supportmember.

8. A press according to claim 7 wherein said lower roll has a reducedportion at each end forming a journal for supporting engagement with thebearing at each end of the lower roll and wherein said upper roll hasits journal portion at each end substantially the same size as thebalance of the roll.

9. A press according to claim 8 wherein said bearing support for thelower roll has a vertically disposed threaded aperture therein, saidadjustable support means for the bearing support member for the lowerroll comprises a vertically disposed shaft having a reduced collarformed thereon, a support attached to the frame within which said shaftis supported at said reduced portion, said shaft having its upper endthreaded and received in said threaded aperture and control meansattached to said shaft for rotating same so as to adjustably positionsaid bearing support along its spaced apart guide members.

10. A press according to claim 9 including lock means for holding saidcontrol means for said vertical shaft in a set position.

11. A press according to claim 2 wherein said guide means over whichsaid web from its spool is led between said rolls comprises anon-rotating bearing bar having a dielectric covering thereon and anexpander roll over which said web rolls, said bearing bar being disposedin spaced relation from. said spool and on the opposite side of avertical plane passing through said expander rolls and said spool fromwhich said press rolls are spaced and said expander roller beingdisposed vertically intermediate said bearing bar and said press rolls.

12. A press for continuously pressing together material sandwichedbetween two in-running webs comprising a pair of upright end frames, ahorizontally disposed lower roll, means for mounting the lower rollcomprising an end bearing assembly at each end of the roll and a pair ofvertically extending spaced apart guide members attached to each frameand in guiding engagement with each. of said bearing assemblies, biasingmeans on said spaced apart guidesurging said bearing assembly downwardand adjustable support means attached to the frame and in supportingengagement with said bearing assembly for moving the bearing assemblyand the lower roll up and down while said biasing means urges thebearing assembly downward; and upper horizontally disposed roll forpressing engagement with said lower roll to press together the webs andthe material sandwiched therebetween; means for mounting the upper rollcomprising an end bearing assembly at each end of the upper roll, a pairof vertically extending support guide members attached to each of saidframes and in guiding engagement with each of said bearing assembliesfor the upper roll; biasing means associated with said verticallyextending spaced apart guide members and urging said bearing assembliesfor the upper roll upward; means for supporting the upper ends of anupper and lower spool of web stock, each of said spool support meansbeing attached to said frame members and comprising a base memberpivotally attached to said frame members, a secondary member slidablymounted on said base member, a pair of rollers mounted on said slidemember and adapted to rollingly support the end of each spool; means forapplying resistance to the rolling movement of each spool; guide meansover which said web from the spool is led to between said roll; andfluid pressure means associated with each of said upper bearingassemblies for applying pres sure thereto to urge said upper roll towardsaid lower roll to apply pressure to the web and material passingbetween said rolls, said fluid pressure means comprising a cylindermounted 011 each of said upright end frames, each of said cylindershaving a closed upper end and an open lower end, said closed upper endhaving an outlet to a pressure source, said open lower end receiving aplunger reciprocal within said cylinder and extending down out of saidcylinder, said lower end of said piston being secured to said upperbearing.

13, A press for continuously pressing together materials sandwichedbetween two iii-running webs comprising a pair of upright end frames; ahorizontally disposed lower roll; means for mounting the lower rollcomprising an end bearing assembly at each end of the roll, a pair ofvertically extending spaced apart guide members attached to each frameand in guiding engagement with each of said bearing assemblies, biasingmeans on said spaced apart guides urging said bearing assembly downwardand adjustable support means attached to the frame in supporti ngengagement with said bearing assembly for moving the bearing assemblyand the lower roll up and down while said biasing means urges thebearing assembly downward, said bearing support for the lower rollhaving a vertically disposed threaded aperture therein, said adjustablesupport means for the bearing support member for the lower rollcomprising a vertically disposed shaft having a reduced collar formedthereon, a support attached to the frame within which said shaft havingits upper end threaded and received in said threaded aperture, and ahandwheel attached to said shaft for rotating same so as to adjustablyposition said bearing support along spaced apart guide members; an upperhorizontally disposed roll for pressing engagement with said lower rollto press together the webs and the material sandwiched therebetween;means for mounting the upper roll comprising an end bearing assembly ateach end of the upper roll, a pair of vertically extending spaced apartguide members attached to each of said frames and in guiding engagementwith each of said bearing assemblies for the upper roll, biasing meansassociated with said vertically extending spaced apart guide members andurging said bearing assemblies for the upper roll upward; means forsupporting the ends of an upper and lower spool of web stock, each ofsaid spool support means being attached to said frame members andcomprising a base member pivotally attached to said frame members, asecondary member slidably mounted on said base member, a pair of rollersmounted on said slide member and adapted to rollingly support the end ofeach spool; means for applying a resistance to the rolling movement ofeach spool; guide means over which said web from the spool is led tobetween said rolls; and fluid pressure means associated with each saidupper bearing assembly for applying pressure thereto to urge said upperroll toward said lower roll to apply pressure to the webs and materialpassing between said rolls.

14. A press for continuously pressing together materials sandwichedbetween two in-running webs comprising a pair of upright end frames; ahorizontally disposed lower roll; means for mounting the lower rollcomprising an end bearing assembly at each end of the roll, a pair ofvertically extending spaced apart guide members attached to each frameand in guiding engagement with each of said bearing assemblies, biasingmeans on said spaced apart guides urging said bearing assembly downwardand adjustable support means attached to the frame and in supportingengagement with said bearing assembly for moving the bearing assemblyand the lower roll up and down while said biasing means urges thebearing assembly downward, said bearing support for the lower rollhaving a vertically disposed threaded aperture therein, said adjustablesupport means for the bearing support member for the lower rollcomprising a vertically disposed shaft having a reduced collar formedthereon, a support attached to the frame within which said shaft issupported at said reduced portion, said shaft for rotating same so as toadjustably position said bearing support along spaced apart guidemembers; lock means for holding said control means for said verticalshaft in a set position, said lock means comprising, said control meansattached to said shaft comprising a wheel, said lock means comprising aplurality of evenly spaced holes about the periphery of said wheel and arod reciprocally mounted on said end frame to extend into a selected oneof said holes on the periphery of said wheel; an upper horizontallydisposed roll for pressing engagement with said lower roll to presstogether the webs and the material sandwiched therebetween; means formounting the upper roll comprising an end bearing assembly at each endof the upper roll, a pair of vertically extending spaced apart guidemembers attached to each of said frames and in guiding engagement witheach of said bearing assemblies for the upper roll, biasing meansassociated with said vertically extending spaced apart guide members andurging said bearing assemblies for the upper roll upward; means forsupporting the ends of an upper and lower spool of web stock, each ofsaid spool support means being attached to said frame members andcomprising a base member pivotally attached to said frame members, asecondary member slidably mounted on said base member, a pair of rollersmounted on said slide member and adapted to rollingly support the end ofeach spool; means for applying a resistance to the rolling movement ofeach spool; guide means over which said web from the spool is led tobetween said rolls; and fluid pressure means associated with each saidupper bearing assembly for applying pressure thereto to urge said upperroll toward said lower roll to apply pressure to the webs and materialpassing between said rolls.

References Cited in the file of this patent UNITED STATES PATENTS1,421,805 Melown July 4, 1922 1,427,477 Kaufmann et al. Aug. 29, 19221,943,145 Ruegenberg Jan. 9, 1934 2,234,214 Young Mar. 11, 19412,316,824 Tobias et a1 Apr. 20, 1943 2,518,263 Aabel Aug. 8, 19502,528,152 Langraf Oct. 31, 1950 2,628,176 Simon et al Feb. 10, 19532,687,165 Hollis Aug. 24, 1954 2,726,979 Grant Dec. 13, 1955

